An It Boy is a man who causes a big impact on the public waking up inspiration on them. It can have different adjectives and characteristics that defines the person who is named It Boy, an example is Choi Yeonjun who is the 4th Gen It Boy.
The 4TH Gen in his title refers to the impact that he has on Gen Z inspiring a lot of teenagers and young people with his style.
Did you know Harry Styles is an It Boy?
Anyone can be your it boy.